Lasting machine for shoe manufacture



May 8, 1962 H. SCHWABE LASTING MACHINE FOR SHOE MANUFACTURE 2 Sheets-Sheet 1 Filed April 17, 1961 INVENTOR.

#(PMA/V SC/IWABE H. SCHWABE LASTING MACHINE FOR SHOE MANUFACTURE May 8, 1962 2 Sheets-Sheet 2 Filed April 17, 1961 FIG. 5

FIG. 4

4 7 0 M y Lk a j K 4 INV EN TOR. fizz/14 4 Sum/A56 ATI'OI/VE/S United States Patent 3,032,790 LASTHJG MACHINE FOR HOE MANUFACTURE Herman Sehwabe, 420 West End Ave, New York, N.Y. Filed Apr. 17, 1961, Ser. No. 113,579 7 Claims. (Cl. 12-7.1)

This invention relates to the manufacture of shoes, and more particularly to lasting machines.

Machines are already known which pull an upper around a last and fold the marginal portion of the upper inwardly around an insole, the latter being cemented to hold the upper. Pincers are used to pull the upper, followed by flat wipers which help smooth the upper material against the bottom of the insole.

Such machines have worked well, but now when pointed shoes are in fashion, difficulty has arisen because of the gathering of an excessive amount of upper material at the toe. This excess upper material must be cut away, and it has already been proposed to provide a trimmer knife, with additional mechanism to operate the same following the operation of the wipers. Such a knife has been operated either by a hand lever or by a power cylinder.

The general object of the present invention is to simplify the mechanism and the operation of such lasting machines. A more specific object is to provide a trimmer or knife that is moved by the movement of the wipers, so that the operation of the knife is automatic and is simultaneous with the operation of the wipers, and requires no additional power cylinder or other operating mechanism.

To accomplish the foregoing general objects, and other more specific objects which will hereinafter appear, my invention resides in the lasting machine and knife and wiper elements, and their relation one to another, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings in which:

FIG. 1 is a vertical section through a known lasting machine to which my improvement has been applied;

FIG. 2 is a perspective view showing the wipers and knife in disassembled relation;

FIG. 2-A is a fragmentary vertical section through one of two studs used to connect the parts shown in FIG. 2;

FIG. 3 is a fragmentary bottom plan View showing the wipers and knife in their closed condition;

FIG. 4 is a section taken approximately in the plane of the line 44 of FIG. 1, and drawn to larger scale; and

FIG. 5 is a partially sectioned elevation looking toward the right side of the mechanism shown in FIG. 4.

Referring to the drawing, and more particularly to FIG. 1, the lasting machine there shown is one made by Schoen & Cie. G.m.b.H. of Pirmasens, West Germany, it being their model 63C Pulling Over and Toe Lasting Machine. The said machine is disclosed and described in a copending U.S. patent application of Albert Michel and Herbert Schindler, Serial No. 19,222, filed April 1, 1960, and entitled Machine for Pulling Over a Last and Gluing the Uppers of Shoes. FIGS. 1, 4, and 5 of the present drawing correspond substantially to FIGS. 2, 13 and 14 of the said co-pending patent application.

Referring to FIG. 1, a last 12 is preliminarily provided with an insole on its bottom and an upper around the last. This assembly is only schematically represented in FIG. 1 by the last 12, no attempt being made to show the details of the upper and the insole. The assembly is placed on a bottom rest 14, and a treadle is operated through a series of steps. As a result of these steps a cylinder 16 moves a machine head generally designated bodily longitudinal movement of the wipers.

3,032,799 Patented May 8,v 1962 18 toward the left to bring the lasting mechanism to the shoe on the rest; a cylinder at 20 causes lever 22 to move a toe presser 24 against the top of the shoe; a cylinder 26 causes lever 28 to move a heel abutment 30 against the heel of the shoe. Thereafter five pincers, not shown (a toe pincer, two side pincers, and two ball pincers), pull the upper downwardly and inwardly, this resulting from the operation of small hydraulic cylinders controlling the individual pincers.

Cylinder 32 then causes movement of the wipers. There is a pivotal movement toward one another, and also a bodily movement of both wipers in a direction longitudinal of the shoe, that is, toward the left as seen in FIG. 1. As soon as the wipers move in beneath the shoe enough to support the shoe, the toe rest or support 14 descends, by release of toggle 15 by a cylinder at 17, and the five pincers are released and retracted, thereby clearing the path for additional movement of the wipers.

Referring now to FIGS. 2-5 of the drawing, the lasting machine comprises a pair of fiat wipers 36 and 38, and a knife 40 which is mounted on that face of the wipers which is away from the shoe being lasted. The knife is flat and has its cutting edge 42 extending in a direction transverse of the direction of longitudinal movement of the wipers, for movement therewith. The knife 40 is connected to the Wipers, the coupling means comprising slots 44 and studs 45 (FIG. 2-A) received in the slots 44 and in threaded holes 46.

In preferred form the slots are disposed at divergent angles relative to the direction of longitudinal movement because with such an arrangement the inward or pivotal movement of the wipers toward one another, causes a cutting movement of the knife additional to the The slots 44 preferably are provided in the knife, and the holes 46 in the wipers, thereby minimizing the change needed in the machine as originally manufactured. A single machine may be equipped with many pairs of wipers, to fit the many different sizes and shapes of shoes. These are drilled and tapped at 46.

The knife 40 is preferably arcuately shaped, that is, the knife has ends 48 which extend in the direction of the wipers, and the knife is dimensioned to fit between the wiper supports, as next described, and therefore does not interfere with the normal operation of the same.

Referring to FIGS. 4 and 5, wiper 36 is pivotally held between the upper and lower plates of a movable wiper support 50, and wiper 38 is pivotally held in a corresponding movable wiper support 52. The wipers are pivotally connected to the wiper supports at 54 and 56 respectively. The movable wiper supports are carried between the upper and lower plates of relatively stationary wiper supports 58 and 60 (the lower plate being omitted in FIG. 4), which constitute a wiper head carried at 62 by a piston-like member 64. The latter is in alignment with a piston 66 movable in a cylinder 32, operated like the other cylinders by an oil supply, connected at 68 (FIG. 5). Piston 66 carries a yoke or cross bar 70.v The latter is connected by adjustable links 72 and 74 to the movable wiper holders 50 and 52.

On reflection it will be seen that when hydraulic power is applied to cylinder 32 the piston 66 and yoke 70 cause pivotal inward movement of the wipers 36 and 38. Thereafter an axial piston projection or stud 76 reaches and bears against the piston 64, which results in bodily movement of the wipers in a direction longitudinal of the shoe 12. Return movement is caused by compression springs 78 and pull springs 80. The stud 76 and the links 72, 74 are adjustable to fit different shoes.

In FIG, 4 the wipers are shown in open position, and the knife 49 is retracted. FIG. 3 shows the wipers in advanced position, with the knife 40 at the end of its cutting stroke. It will be seen that the travel of the knife is made up of two components, one resulting from the inward. movement of the wipers as applied by the studs 45 to the divergent slots 44, and the other resulting from the bodily movement of the wipers and knife in a direction longitudinal of the shoe. Thus in FIG. 4 the studs are at the outer ends of the slots whereas in FIG. 3 the studs are at the inner ends of the slots.

FIGS. 3 and 4 also show how the contour of the knife is such that it fits within the wiper supports 59 and 52, and thus may rest flat against the face of the wipers. This relation is shown at 38, 4t 42 in FIG. 5 of the drawing. It will understand that with the shoe in erect position, as shown in FIG. 1, the knife is on the bottom face of the wipers. Its trimming operation is spaced from the insole by the amount of the thickness of the wipers. This is satisfactory because it is only the bunched-up excessive upper material which is tobe trimmed away.

The present invention is not limited to the particular lasting machine here shown, but is applicable to other lasting machines which use wipers of the same general character. One example is the model LM6 Bed Laster made by United Shoe Machinery Corp. of Boston, Mass. Other examples are the lasting machines shown in US. patents to Charles F. Pym 1,274,589 and 1,174,590, dated August 6, 1918, and US. Patent to Kamborian 2,210,586, granted August 6, 1940. It will be understood that in some of these machines the shoe is placed in the machine upside down, and in such case the knife is on the upper side of the wipers instead of being on the lower side of the wipers.

It is believed that the construction and operation of my improvement in lasting machines, as well as the advantages of the same, will be apparent from the foregoing detailed description. It will also be apparent that while I have shown and described the invention in a preferred form, changes may be made in the structure shown without departing from the scope of the invention, as sought to be defined in the following claims.

I claim:

1. A shoe lasting machine comprising a pair of opposed wipers, means to move the same pivotally toward one another inward of and also longitudinally of a shoe in said machine, a knife pivotally mounted on that face of said wipers which is away from the shoe being lasted, said knife having its cutting edge extending in a direction transverse of the direction of longitudinal movement of the wipers, said knife being connected to the wipers for movement therewith in the direction of movement of the wipers longitudinally of the shoe, the resulting automatic movement of the knife serving to sever excess upper material gathered at the toe of the shoe.

2. A shoe lasting machine comprising a pair of flat opposed wipers, means to move the same pivotally toward one another inward of and also longitudinally of a shoe in said machine, a knife pivotally mounted on that face of said wipers which is away from the shoe lasted, said knife being fiat and having its cutting edge extending in a direction transverse of the direction of longitudinal move ment of the wipers for movement therewith, the ends of said knife having means coupling the same to the wipers, said coupling means comprising slots and studs received in said slots, the resulting automatic movement of the knife with the wipers serving to sever excess upper material gathered at the toe of the shoe.

3. A shoe lasting machine comprising a pair of opposed wipers, means to move the same pivotally toward one another inward of and also longitudinally of a shoe in said machine, a knife pivotally mounted on that face of said wipers which is away from the shoe being lasted, said knife having its cutting edge extending in a direction transverse of the direction of longitudinal movement of the Wipers for movement therewith, the ends of said knife having means coupling the same to the wipers, said coupling means comprising slots disposed at divergent angles relative to the direction of longitudinal movement, and studs slidably received in said slots, whereby the inward movement of the Wipers causes a cutting movement of.

in said machine, a knife pivotally mounted on that facev of said wipers which is away from the shoe being lasted, said knife being flat and having its cutting edge extending in a direction transverse of the direction of longitudinal movement of the wipers for movement therewith, the ends of said knife having slots disposed at divergent angles relative to the direction of longitudinal movement, and said wipers having studs slidably received in said slots, whereby the inward movement of the wipers causes a cutting movement of the knife in a direction longitudinal of the shoe additional to the longitudinal movement of the wipers.

5. A shoe lasting machine comprising a pair of opposed arcuately shaped wipers, means to move the same pivotally toward one another inward of and also longitudinally of a shoe in said machine, a knife pivotally mounted on that face of said wipers. which is away from the shoe being lasted, said knife having its cutting edge extending in a direction transverse of the direction of longitudinal movement of the wipers for movement therewith, the ends of said knife extending in the direction of the Wipers and having slots disposed at divergent angles relative to the direction of longitudinalv movement, and said wipers: having studs slidably received in said slots, whereby the inward movement of the wipers causes a cutting movement of the knife in a direction longitudinal of the shoe additional to the longitudinal movement of the wipers, the resulting automatic movement of the knife serving to sever excess upper material gathered at the toe of the shoe.

6. A shoe lasting machine comprising a pair of opposed wipers, means to move the same pivotally toward one another inward of a shoe in said machine, a knife pivotally mounted on that face of said wipers which is away from the shoe being lasted, said knife having its cutting edge extending in a direction transverse of the wipers and of the long axis of the shoe, the ends of said knife having means coupling the same to the wipers, said coupling means comprising slots disposed at divergent angles relative to the long axis of the shoe, and studs slidably received in said slots, whereby the inward movement of the wipers causes a cutting movement of the knife in a direction longitudinal of the shoe, the resulting automatic movement of the knife serving to sever excess upper material gathered at the toe of the shoe.

7. A shoe lasting machine comprising a pair of fiat opposed wipers, means to move the same pivotally toward one another inward of a shoe in saidmachine, a knife pivotally mounted on that face of said wipers which is away from the shoe being lasted, said knife being flat and having its cutting edge extending in a direction transverse of the wipers and of the long axis of the shoe, the ends of said knife having slots disposed at divergent angles relative to the long axis of the shoe, and said wipers having studs slidably received in said slots, whereby the inward movement of the wipers causes a cutting movement of the knife in a direction longitudinal of the shoe.

No references cited. 

